Plain Puzzle

Plain Puzzle Without Solution Link

PuzzleFast

enCR4
zero: zero times anything is zero
commutative: if you reverse the order of the factors, the product is the same
identity: anything times one is that number
Associative: if you group the factors differently, the product will still be the same

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4

E

Across:

4.

anything times one is that number

Down:

1.

if you group the factors differently, the product will still be the same